温度与表面活性剂协同作用下的特超稠油油水固界面行为分析

温度与表面活性剂都是影响稠油油水固流变性的重要因素;但目前针对稠油的流动性改善研究一直停留在以采收率增加量衡量流变效果的层面,忽略了从界面行为变化的角度上分析增强流动性的机理。针对以上问题设计了一系列测量不同因素对流变性、界面张力及接触角的影响试验,探究了温度与表面活性剂协同作用下是否会对改质降黏过程产生增效影响。结果表明稠油对温度敏感性较高,且升高温度与加入表面活性剂都可降低界面张力、改变润湿性、提高流动性。研究还发现,当二者协同作用时会比单一因素影响获得更好的降黏效果。

Behavior Analysis of Oil-Water-Solid Interface of Heavy Oil with Temperature and Surfactant Synergistic

There is no denying that temperature and surfactant are important factors for heavy oil rheology, but the current research on the improvement of fluidity of heavy oil has been stuck in the aspect of measuring the rheological effect with the increase of recovery rate, and neglects the behavior from the interface. The mechanism of enhancing liquidity was analyzed from the perspective of change. A series of experiments were carried out to measure the effects of different factors on rheological properties, interfacial tension and contact angle, and the effects of temperature and surfactant on the modification and viscosity reduction process were investigated. The result shows that the heavy oil is sensitive to temperature, and the elevated temperature and the addition of surfactant can reduce the interfacial tension, change the wettability and improve the fluidity. The study also finds that when the two synergistically act, a better viscosity reduction effect is obtained than a single factor.